still that the fbi has said we found child porn, that scares people to their very core. >> that's why they pay up? >> yes. >> you should never pay a ransom, even if you do regain access to your computer, the hackers have probably dropped other viruss on to your system. rans ransomware has grown so quickly, the fbi just posted a warning on its internet crimes website. >> it's getting very tedious, and you estimate you've lost business as a result? >> yes, i've been up late just trying to solve the problem. >> with more than 4,000 products in his store. >> snow skis, snowboards, water skis, wake boards. >> reporter: he's moving his shop information to cloud computing to prevent another attack. no customer or financial data was breached, but the ransomware hack has cost him time and money. >> our sales are down significantly by the day. >> reporter: how do you avoid ransomware? start with a program like site adviser. it's a free download. any time you visit a website, it will tell you if it's safe with a green checkmark or if it's a risky site where you might pick up some ransomware or o